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FRANK MELVILLE,`OF N EW YORK, N. Y.

Letters Patent No. 82,734, dated October-'6, 1868.

IMPROVEMENT IN SCHOOL-SLATES.

TO ALL WIIOM IT MAY CONCERN:

Beit known that I, FRANK MELVILLE, of' New York, in the county of New York, andv State of New York, have invented a new and useful Improvement in Drawing and Writing-Slates; and I do hereby declare that the following is a full, clear, and exactdeseription thereof, which will enable others skilled in the art to make and use the same, reference being had to theaccompanying drawings, forming part oi` this specificatiolnin which- Figure lis a face or side view of `a, slate having my improvement applied to it.

Figure 2 is a transverse section of the same,v taken in the line a: x of g. l.

Similar letters of reference indicate corresponding parts.

This invention relates to a new and improved mode of applying a writing or drawing-copy to a slate, as hereinafter fully shown and described, whereby such copies may be applied to the ordinary school-slates in use at an inappreciable expense..

In the accompanying sheet of drawings, A represents a slate, and B the wooden frame thereof, made and applied in the ordinary or any proper way.

C is a writing-copy, whichis made on a vstrip of thin wood, s heet metal, or any suitable material, and extends the whole width or length of the slate, or is sufficiently long to lap or triple over the inner edges of the ends or 'sides of the frame B.Y

Notches, a a, are made in the sides or ends of the frame B, of suicient length to admit of the ends of' the strip C passing through them, and the copy being brought in contact with the slate, and the copy is shoved up tothe top or to one side of the slate, the ends of the copy fitting in the grooves in the inner sides of the frame, and the copy held in position by a. spring, b, inserted in the inner edge of the side or end of theframe with which the copy is shoved in contact, (see fig. 2.)

By this simple arrangement, a writing or drawing-copy may be applied to any ordinary school-slate, all that is required being simply to make the notches a a in the inner edges of the slate'frame and insert the spring b.

Having thusdescribed my invention, I claim as new, and desire to secure by Lette'rs Patent- The notches a a, in the inner edge of the frame B, of the slate, in connection with the spring b and the removable*copy C, all arranged substantially as and for the purpose herein set forth. i FRANK MELVILLE.

Witnesses:

WM. F. McNAMARA, ALEX. F. ROBERTS. 

